Yeah, I hate trying to seal connectors that have such a large step up in cable size. It's hard to get the tape to set up right.

I have had a LOT better luck with those little connectors by only buying 18" jumpers. I also have moved to using rg 58u instead of lmr 240 or something like that. The rg cable is about the same loss (especially only 18" of it) and is MUCH more flexible.

Oh yeah, don't get the ones with the right angle connectors either :-).
marlon

----- Original Message ----- From: "Ralph" <[EMAIL PROTECTED]>
To: "'WISPA General List'" <wireless@wispa.org>
Sent: Thursday, February 08, 2007 7:03 AM
Subject: [WISPA] Little installation gotchas. SMA Connectors


Does anyone else have an issue with the tiny little SMA connector that
Trango and some others use for antenna connections?
I have seen several failures where the mating connector on the antenna feed
line self destructs due to leverage caused by the cable. Nothing kills an
installation budget quite as bad as having to do another tower climb or even
a parts run due to something as silly as this! And if you have to go back
because of a later failure at this point it is even worse!

Good RF sense tells you to use as large of a cable as practical for less
loss and for compensation for connector loss, but when using LMR400 (and I
have even seen one WISP use LMR600) for a jumper it is very unstable.

I feel that in order to eliminate this very real single point of failure,
this manufacturer needs to redesign that area.

I don't want to hear that because Trango has either/or dual polarity, it
provides built in backup redundancy- unless you do every installation with a dual pol antenna and have smart enough people to know to switch pol when the
cheesy little connector fails. <grin>



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